All modern engines are not built like they used to. It is not necessary to change “break-in” oil any more. Engines are built separately, run-in and completely ready for the road before they are even sent to the assembly plant.
All new engines are broken in at the time of manufacture, completely flushed, and highly purged from manufacturing debris, as well as filtered carefully during the break-in process.
Rebuilt engines from private shops are the only thing that apply to that old principle.
“All modern engines are not built like they used to. It is not necessary to change “break-in” oil any more. “
I have to say you are all wet. My last new Lexus required a 1,000 mile fluid change and the dealer even paid for it. It makes sense to do this and for manufacturers and dealers to require this to limit their liability under warranty. Better to change the fluids than to take a chance of having to rebuild an engine and replace bearings due to some stray chips.
I was referring to rebuilds done by us.
I just assembled an engine, broke it in, then changed the oil.